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2013-11-27ALSA: usb: use multiple packets per urb for Wireless USB inbound audioThomas Pugliese
For Wireless USB audio devices, use multiple isoc packets per URB for inbound endpoints with a datainterval < 5. This allows the WUSB host controller to take advantage of bursting to service endpoints whose logical polling interval is less than the 4ms minimum polling interval limit in WUSB. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-13ALSA: usb-audio: add front jack channel selector for EMU0204Vasily Khoruzhick
Add support for front jack channel selector which is present on EMU0204. It allows to get 4 channels out of this soundcard. Tested-by: Yury Bushmelev <jay@jay-tech.ru> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-11ALSA: usb: Fix wrong mapping of RLC and RRC channelsAnssi Hannula
According to USB Audio spec v2 bits 25 and 26 of bmChannelConfig are "Back Left of Center - BLC" and "Back Right of Center - BRC", respectively. They are currently assigned to ALSA channels BLC/BRC. However, the ALSA BLC/BRC are actually the rather nonsensical "bottom left center" and "bottom right center", so the channels will be assigned wrongly. The comments in the USB code are also similarly wrong, so this is not readily apparent without looking at the actual specification. Fix the channel mapping by mapping bits 25 and 26 to RLC (Rear Left Center) and RRC (Rear Right Center), respectively, instead. Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-05ALSA: usb - Don't trust the channel config if the channel count changedDavid Henningsson
In case the channel count of the input terminal is not the same as the channel count of the streaming descriptor, the channel config of the input terminal can not be trusted. Instead fall back to a default (guessed) channel map. This was found on a Logitech USB Headset. Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-05ALSA: usb - For class 2 devices, use channel map from altsettingsDavid Henningsson
The channel config from the streaming descriptor is probably a better indicator of the channel map than the input terminal. Use the input terminal's channel map as fallback only. Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-05ALSA: usb: supply channel maps even when wChannelConfig is unspecifiedDavid Henningsson
If wChannelconfig is given for some formats but not others, userspace might not be able to set the channel map. This is RFC because I'm not sure what the best behaviour is - to guess the channel map from the given number of channels (it's quite likely that one channel is MONO and two channels is FL FR), or just to supply UNKNOWN for all channels. But the complete lack of channel map for a format leads userspace to believe that the format is not available at all. Or am I misunderstanding how this should be used? Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-29ALSA: 6fire: Fix probe of multiple cardsTakashi Iwai
The probe code of snd-usb-6fire driver overrides the devices[] pointer wrongly without checking whether it's already occupied or not. This would screw up the device disconnection later. Spotted by coverity CID 141423. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-25Merge tag 'asoc-v3.13' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next ASoC: Updates for v3.13 - Further work on the dmaengine helpers, including support for configuring the parameters for DMA by reading the capabilities of the DMA controller which removes some guesswork and magic numbers fromm drivers. - A refresh of the documentation. - Conversions of many drivers to direct regmap API usage in order to allow the ASoC level register I/O code to be removed, this will hopefully be completed by v3.14. - Support for using async register I/O in DAPM, reducing the time taken to implement power transitions on systems that support it.
2013-10-15ALSA: us122l: Fix pcm_usb_stream mmapping regressionTakashi Iwai
The pcm_usb_stream plugin requires the mremap explicitly for the read buffer, as it expands itself once after reading the required size. But the commit [314e51b9: mm: kill vma flag VM_RESERVED and mm->reserved_vm counter] converted blindly to a combination of VM_DONTEXPAND | VM_DONTDUMP like other normal drivers, and this resulted in the failure of mremap(). For fixing this regression, we need to remove VM_DONTEXPAND for the read-buffer mmap. Reported-and-tested-by: James Miller <jamesstewartmiller@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-09ALSA: usb-audio: Use module_usb_driverSachin Kamat
module_usb_driver makes code simpler by removing the boilerplate. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-08Merge branch 'for-linus' into for-nextTakashi Iwai
For updating the HDMI chmap fix. Conflicts: sound/pci/hda/patch_hdmi.c
2013-10-07ALSA: usb-audio: support wireless devices in snd_usb_parse_dataintervalThomas Pugliese
This patch adds support for dev speed USB_SPEED_WIRELESS in snd_usb_parse_datainterval which allows the usb sound core to create ISO urbs with the correct number and size of buffers. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: add support for wireless USB devicesThomas Pugliese
This patch updates snd_usb_audio_create also support devices whose speed == USB_SPEED_WIRELESS. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: remove unused endpoint flag EP_FLAG_ACTIVATEDEldad Zack
EP_FLAG_ACTIVATED is never tested for, remove it. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: rename alt_idx to altsettingEldad Zack
As Clemens Ladisch kindly explained: "Please note that there are two methods to identify alternate settings: the number, which is the value in bAlternateSetting, and the index, which is the index in the descriptor array. There might be some wording in the USB spec that these two values must be the same, but in reality, [insert standard rant about firmware writers], bAlternateSetting must be treated as a random ID value." This patch changes the name to express the correct usage semantics. No functional change. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: clear SUBSTREAM_FLAG_SYNC_EP_STARTED on errorEldad Zack
If setting the interface fails, the SUBSTREAM_FLAG_SYNC_EP_STARTED should be cleared. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: void return type of snd_usb_endpoint_deactivate()Eldad Zack
The return value of snd_usb_endpoint_deactivate() is not used, make the function have no return value. Update the documentation to reflect what the function is actually doing. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: don't deactivate URBs on in-use EPEldad Zack
If an endpoint in use, its associated URBs should not be deactivated. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: remove deactivate_endpoints()Eldad Zack
The only call site for deactivate_endpoints() at snd_usb_hw_free(). The return value is not checked there, as it is irrelevant if it fails on hw_free. This patch moves the deactivation of the endpoints directly into snd_usb_hw_free(). Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-07ALSA: usb-audio: remove unused parameter from sync_ep_set_paramsEldad Zack
Since the format is not actually used in sync_ep_set_params(), there is no need to pass it down. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-10-02ALSA: snd-usb-usx2y: remove bogus frame checksDaniel Mack
The frame check in i_usX2Y_urb_complete() and i_usX2Y_usbpcm_urb_complete() is bogus and produces false positives as described in this LAU thread: http://linuxaudio.org/mailarchive/lau/2013/5/20/200177 This patch removes the check code entirely. Cc: fzu@wemgehoertderstaat.de Reported-by: Dr Nicholas J Bailey <nicholas.bailey@glasgow.ac.uk> Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Daniel Mack <zonque@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-09-30ALSA: snd-usb-caiaq: LED support for Maschine ControllerHannes Gräuler
This patch adds LED support for the Native Instruments Maschine Controller. It adds ALSA controls for dimming the LEDs of all buttons and the backlight of the two displays. Signed-off-by: Hannes Gräuler <hgraeule@uos.de> Acked-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-09-26ALSA: improve buffer size computations for USB PCM audioAlan Stern
This patch changes the way URBs are allocated and their sizes are determined for PCM playback in the snd-usb-audio driver. Currently the driver allocates too few URBs for endpoints that don't use implicit sync, making underruns more likely to occur. This may be a holdover from before I/O delays could be measured accurately; in any case, it is no longer necessary. The patch allocates as many URBs as possible, subject to four limitations: The total number of URBs for the endpoint is not allowed to exceed MAX_URBS (which the patch increases from 8 to 12). The total number of packets per URB is not allowed to exceed MAX_PACKS (or MAX_PACKS_HS for high-speed devices), which is decreased from 20 to 6. The total duration of queued data is not allowed to exceed MAX_QUEUE, which is decreased from 24 ms to 18 ms. The total number of ALSA frames in the output queue is not allowed to exceed the ALSA buffer size. The last requirement is the hardest to implement. Currently the number of URBs needed to fill a buffer cannot be determined in advance, because a buffer contains a fixed number of frames whereas the number of frames in an URB varies to match shifts in the device's clock rate. To solve this problem, the patch changes the logic for deciding how many packets an URB should contain. Rather than using as many as possible without exceeding an ALSA period boundary, now the driver uses only as many packets as needed to transfer a predetermined number of frames. As a result, unless the device's clock has an exceedingly variable rate, the number of URBs making up each period (and hence each buffer) will remain constant. The overall effect of the patch is that playback works better in low-latency settings. The user can still specify values for frames/period and periods/buffer that exceed the capabilities of the hardware, of course. But for values that are within those capabilities, the performance will be improved. For example, testing shows that a high-speed device can handle 32 frames/period and 3 periods/buffer at 48 KHz, whereas the current driver starts to get glitchy at 64 frames/period and 2 periods/buffer. A side effect of these changes is that the "nrpacks" module parameter is no longer used. The patch removes it. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Clemens Ladisch <clemens@ladisch.de> Tested-by: Daniel Mack <zonque@gmail.com> Tested-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-09-26ALSA: Fix assignment of 0/1 to bool variablesPeter Senna Tschudin
Convert 0 to false and 1 to true when assigning values to bool variables. Inspired by commit 3db1cd5c05f35fb43eb134df6f321de4e63141f2. The simplified semantic patch that find this problem is as follows (http://coccinelle.lip6.fr/): @@ bool b; @@ ( -b = 0 +b = false | -b = 1 +b = true ) Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-23Merge tag 'asoc-v3.12' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next ASoC: Updates for v3.12 - DAPM is now mandatory for CODEC drivers in order to avoid the repeated regressions in the special cases for non-DAPM CODECs and make it easier to integrate with other components on boards. All existing drivers have had some level of DAPM support added. - A lot of cleanups in DAPM plus support for maintaining controls in a specific state while a DAPM widget all contributed by Lars-Peter Clausen. - Core helpers for bitbanged AC'97 reset from Markus Pargmann. - New drivers and support for Analog Devices ADAU1702 and ADAU1401(a), Asahi Kasei Microdevices AK4554, Atmel AT91ASM9x5 and WM8904 based machines, Freescale S/PDIF and SSI AC'97, Renesas R-Car SoCs, Samsung Exynos5420 SoCs, Texas Instruments PCM1681 and PCM1792A and Wolfson Microelectronics WM8997. - Support for building drivers that can support it cross-platform for compile test.
2013-08-12ALSA: usb-audio: Fix invalid volume resolution for Logitech HD Webcam C525Maksim A. Boyko
Add the volume control quirk for avoiding the kernel warning for the Logitech HD Webcam C525 as in the similar commit 36691e1be6ec551eef4a5225f126a281f8c051c2 for the Logitech HD Webcam C310. Reported-by: Maksim Boyko <maksim.a.boyko@gmail.com> Tested-by: Maksim Boyko <maksim.a.boyko@gmail.com> Cc: <stable@vger.kernel.org> # 3.10.5+ Signed-off-by: Maksim Boyko <maksim.a.boyko@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-12ALSA: usb-audio: fix automatic Roland/Yamaha MIDI detectionClemens Ladisch
Commit aafe77cc45a5 (ALSA: usb-audio: add support for many Roland/Yamaha devices) had several logic errors that prevented create_auto_midi_quirk from enumerating any MIDI ports. Reported-by: Keith A. Milner <maillist@superlative.org> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-12ALSA: 6fire: make buffers DMA-able (midi)Torsten Schenk
Patch makes midi output buffer DMA-able by allocating it separately. Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-12ALSA: 6fire: make buffers DMA-able (pcm)Torsten Schenk
Patch makes pcm buffers DMA-able by allocating each one separately. Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-08ALSA: don't push static constants on stack for %*phAndy Shevchenko
There is no need to pass constants via stack. The width may be explicitly specified in the format. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-08ALSA: usb-audio: do not trust too-big wMaxPacketSize valuesClemens Ladisch
The driver used to assume that the streaming endpoint's wMaxPacketSize value would be an indication of how much data the endpoint expects or sends, and compute the number of packets per URB using this value. However, the Focusrite Scarlett 2i4 declares a value of 1024 bytes, while only about 88 or 44 bytes are be actually used. This discrepancy would result in URBs with far too few packets, which would not work correctly on the EHCI driver. To get correct URBs, use wMaxPacketSize only as an upper limit on the packet size. Reported-by: James Stone <jamesmstone@gmail.com> Tested-by: James Stone <jamesmstone@gmail.com> Cc: <stable@vger.kernel.org> # 2.6.35+ Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-07ALSA: 6fire: fix DMA issues with URB transfer_buffer usageJussi Kivilinna
Patch fixes 6fire not to use stack as URB transfer_buffer. URB buffers need to be DMA-able, which stack is not. Furthermore, transfer_buffer should not be allocated as part of larger device structure because DMA coherency issues and patch fixes this issue too. Cc: stable@vger.kernel.org Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> Tested-by: Torsten Schenk <torsten.schenk@zoho.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: WARN_ON when alts is passed as NULLEldad Zack
Prevent NULL dereference in snd_usb_add_endpoints(), when alts is passed as NULL. In this case, WARN (since this is a non-fatal bug) and return NULL ep. Call sites treat a NULL return value as an error. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: remove implicit_fb from quirkEldad Zack
Since the quirks all apply to implicit feedback (the source endpoint is always a data endpoint), there's no need to set and check a flag for it. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: remove is_playback from implicit feedback quirksEldad Zack
An implicit feedback endpoint can only be a capture source. The consumer (sink) of the implicit feedback endpoint is therefore limited to playback EPs. Check if the target endpoint is a playback first and remove redundant checks. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: do not initialize and check implicit_fbEldad Zack
Since implicit_fb is not changed, !implicit_fb will always be true - it is set only after these checks. Similarly, there's also no need to set it at the top of the function. Change the type of implicit_fb to bool (more appropriate). Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: reverse condition logic in set_sync_endpointEldad Zack
Reverse logic on the conditions required to qualify for a sync endpoint and remove one level of indendation. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: move implicit fb quirks to separate functionEldad Zack
Separate setting implicit feedback quirks from setting a sync endpoint (which may also be explicit feedback or async). Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: separate sync endpoint setting from set_formatEldad Zack
Setting the sync endpoint currently takes up about half of set_format(). Move it to a dedicated function. No functional change. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: remove assignment from if conditionEldad Zack
Following general kernel style. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06ALSA: usb-audio: remove disabled debug code in set_formatEldad Zack
Code block does not compile when enabled. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29ALSA: usx2y: remove an unneeded checkDan Carpenter
The test here is always true because S[i].urb is an array not a pointer. Also it's bogus because the intent was to test: if (S->urb[i]) { instead of: if (S[i].urb) { Anyway, usb_kill_urb() and usb_free_urb() accept NULL pointers so we can just remove this. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-24ALSA: hiface: return correct XRUN indicationEldad Zack
Return SNDRV_PCM_POS_XRUN (snd_pcm_uframes_t) instead of SNDRV_PCM_STATE_XRUN (snd_pcm_state_t) from the pointer function of hiface, as expected by snd_pcm_update_hw_ptr0(). Caught by sparse. Cc: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-21ALSA: usb-audio: 6fire: return correct XRUN indicationEldad Zack
Return SNDRV_PCM_POS_XRUN (snd_pcm_uframes_t) instead of SNDRV_PCM_STATE_XRUN (snd_pcm_state_t) from the pointer function of 6fire, as expected by snd_pcm_update_hw_ptr0(). Caught by sparse. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-15ALSA: usx2y: Fix unlocked snd_pcm_stop() callTakashi Iwai
snd_pcm_stop() must be called in the PCM substream lock context. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-15ALSA: ua101: Fix unlocked snd_pcm_stop() callTakashi Iwai
snd_pcm_stop() must be called in the PCM substream lock context. Cc: <stable@vger.kernel.org> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-15ALSA: 6fire: Fix unlocked snd_pcm_stop() callTakashi Iwai
snd_pcm_stop() must be called in the PCM substream lock context. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-10ALSA: usb-audio: fix regression for fixed stream quirkEldad Zack
Commit 8f898e92aea2c24c7f379ee265d178f69ebb9c07 removed the redundant reads of bInterfaceProtocol from the descriptors, but introduced a regression to devices with quirks of type QUIRK_AUDIO_FIXED_ENDPOINT, since fp->protocol is not set in setup process. As a consequence, audio streams would not get initialized, as the following logs show: [ 48.923043] setting usb interface 3:1 [ 48.923056] Creating new capture data endpoint #81 [ 48.923484] 4:3:1: cannot set freq 48000 to ep 0x81 This patch sets fp->protocol in create_fixed_stream_quirk() and resolves the regression. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-06-28ALSA: usb-audio: Add Audio Advantage Micro IIPrzemek Rudy
This patch is adding extensive support (beside standard usb audio class) for Audio Advantage Micro II usb sound card. Features included: - Access to AES bits (so now sending the IEC61937 compliant stream is possible). - Mixer SPDIF control added to turn on/off the optical transmitter. Signed-off-by: Przemek Rudy <prudy1@o2.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-06-28Merge branch 'full-roland-support' of ↵Takashi Iwai
git://git.alsa-project.org/alsa-kprivate into for-next For adding support for many Roland and Yamaha devices: * 'full-roland-support' of git://git.alsa-project.org/alsa-kprivate: ALSA: usb-audio: add quirks for Roland QUAD/OCTO-CAPTURE ALSA: usb-audio: claim autodetected PCM interfaces all at once ALSA: usb-audio: remove superfluous Roland quirks ALSA: usb-audio: add MIDI port names for some Roland devices ALSA: usb-audio: add support for many Roland/Yamaha devices ALSA: usb-audio: detect implicit feedback on Roland devices ALSA: usb-audio: store protocol version in struct audioformat
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